hello to all of you , i am looking at buying an early subaru wrx, sti would be nice but no nothing about them. i have seen a few on ebay but would'nt no how to tell the difference between the models !

Subaru Impreza Japaneese Import 51K Miles (82000 KM) on eBay, also, Subaru, Cars, Cars, Parts Vehicles (end time 09-Apr-09 00:21:08 BST)

this one is just advertised as a Subaru Impreza Japaneese Import but badged as a wrx sti is it ? as i have a chance of buying it as the bidder let him down , i liked it because it looks completly standard so may have had an easeir life ?
anyways any info would be appreciated,#
cheers
carl